I would find it helpful if someone could define each of these quantities.
A FANDOM User
Ok bonus damage gives a percentage boost to all your attacks so say you have a bonus damage of 50% then every attack you do (magic or physical) will hit 50% harder. Crit chance is your probabilty of getting a critical attack so like a 10% crit chance means about 1/10 attacks will hit critically (note this is based on luck so that doesnt gurantee it will be exactly 1 in 10) lastly is the crit damage. This gives you a set bonus of damage that your critical will do (note that if you have no crit chance crit damage is useless since its impossible to hit a critical)